NDLI: Kinetic, Equilibrium, and Thermodynamic Studies of the Biosorption of Cd(II), Pb(II), and Zn(II) from Aqueous Solutions using Coconut (Cocos nucifera) Leaf.

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Kinetic, Equilibrium, and Thermodynamic Studies of the Biosorption of Cd(II), Pb(II), and Zn(II) from Aqueous Solutions using Coconut (Cocos nucifera) Leaf.

Content Provider	Semantic Scholar
Author	Babarinde, N. A. Adesola Babalola, Jonathan Oyebamiji Adegoke, John George, Esther O. Okeke, Henrietta O. Obagbemi, Ayoola T.
Copyright Year	2012
Abstract	The biosorption characteristics of Cd(II), Pb(II), and Zn(II) from solution using coconut (Cocos nucifera) leaf were investigated. Optimum biosorption conditions were determined as a function of solution pH, contact time, initial metal ion concentration, dosage, and temperature. Optimum pH for each metal ion was obtained as the biosorption of each of the metal ions was found to be pH-dependent. Kinetic study showed that the pseudo-second-order kinetic model best represents the biosorption of the metal ions. The biosorption capacity of coconut leaf for Cd(II), Pb(II), and Zn(II) are 97.28, 69.54 and 50.18 mg g -1 , respectively. The sorption of each metal ion was analyzed with Freundlich and Langmuir isotherm models, in each case, the Freundlich model appears to have better regression coefficients than the Langmuir model. The study on the effect of dosage showed that the dosage of the biomass significantly affected the uptake of the metal ions from solution. The calculated thermodynamic parameters (∆G˚, ∆H˚, and ∆S˚) showed that the biosorption of each of the metal ions onto coconut leaf was feasible, spontaneous, and endothermic. The order of spontaneity of the biosorption process being Cd(II)>Pb(II)>Zn(II). Similarly, positive change in entropy was observed for each and the order of disorder is Cd(II) >Zn(II)>Pb(II).
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.akamaiuniversity.us/PJST13_1_430.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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